1999 Ford Expedition Q&A

1999 Ford Expedition Question: What can I check beside leaks,spark plugs,coils and connectors

Checked with a Valve Guage Tester and read Late Ingition Timing I have checked for leaks Coil on plugs good Put new spark plugs -
Answer 1
What are you checking for, tell us what the problem is! -
Comment 1
Did a tune up. Started to run with a rough idle and smoking Was not doing this before tune up Rechecked everything to make sure So checked with a gauge and it read LATE INGITION TIMING Also no codes have come out So trying to find out what has caused this It also wants to stall -
Comment 2
try dis connect battery for a few minutes. comp. should go to default. might help. -